Cita APA (7th ed.)
Nelson, P. E. (1990). Confidence in public speaking (4th ed.). Wm.C.Brown.
Cita Chicago (17th ed.)
Nelson, Paul Edward. Confidence in Public Speaking. 4th ed. Iowa: Wm.C.Brown, 1990.
Cita MLA (9th ed.)
Nelson, Paul Edward. Confidence in Public Speaking. 4th ed. Wm.C.Brown, 1990.
Atenció: Aquestes cites poden no estar 100% correctes.